peb Posted March 24, 2012 Report Share Posted March 24, 2012 I have always bisque fired to ^06 but have recently begun doing some "naked raku" for which bisque firing to ^010 is recommended. I have tried both, and the naked raku results for pieces bisqued to ^010 are nicer. My question is, how will pieces bisqued to ^010 behave in high fire (^10 gas reduction)? I would like to avoid having to conduct separate bisque firings, but I haven't been brave enough to try glazing and firing these ^010 bisqued pieces in high fire. Thanks in advance for your help! Link to comment Share on other sites More sharing options...
Lucille Oka Posted March 25, 2012 Report Share Posted March 25, 2012 The maturation point of your clay dictates how high a piece can be fired. Is your clay rated to cone 10? If it is not, don't do it, you may end up with a melted clay puddle on your now ruined kiln shelf. Link to comment Share on other sites More sharing options...
bciskepottery Posted March 25, 2012 Report Share Posted March 25, 2012 I think it will depend on your clay body. A higher bisque temperature burns off organics and other "nasties", e.g., clay with manganese etc. You need a higher bisque temperature to get rid of those parts. If not burned out during bisque, they could affect your glaze results . . . blisters or other surface faults. Sometimes a lower temperature bisque is desired . . . I recall some who use porcelain and carbon trap shinos like a softer bisque because it allows the soda ash to permeate the walls more easily and create carbon patterns. You will have to adjust your glaze thickness/application with a softer fired bisque. Softer bisque is more absorbent. Link to comment Share on other sites More sharing options...
peb Posted March 25, 2012 Author Report Share Posted March 25, 2012 Thank you both. I should have included that the clay I'm using is Highwater's Phoenix Stoneware. I will try to look into its content and its firing recommendations. Link to comment Share on other sites More sharing options...
bciskepottery Posted March 25, 2012 Report Share Posted March 25, 2012 Phoenix is a Cone 10 clay body that has good thermal shock characteristics. Link to comment Share on other sites More sharing options...
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